/*
 *  Copyright 2007 Google Inc.

 * 	Licensed under the Apache License, Version 2.0 (the "License");
 *	you may not use this file except in compliance with the License.
 *	You may obtain a copy of the License at
 
 *  	http://www.apache.org/licenses/LICENSE-2.0

 *	Unless required by applicable law or agreed to in writing, software
 *	distributed under the License is distributed on an "AS IS" BASIS,
 *	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *	See the License for the specific language governing permissions and
 *	limitations under the License.

 */

package com.byjyate.rssdreamwork;

import org.w3c.dom.*;

public abstract class RssItemTransformer implements RssTransformer {
	@Override
	public void applyTransform(Element channelNode) {
		if (channelNode == null)
			throw new NullPointerException();

		NodeList items = channelNode.getChildNodes();
		for (int i = items.getLength() - 1; i >= 0; i--) {
			Node item = items.item(i);
			if (item.getNodeName().toLowerCase().equals("item"))
				processItem(item);
		}
	}

	protected abstract void processItem(Node item);
	
}
